SD Gundam G Generation Portable

most Gundams and units have necessities in their weapon list. For example, nearly all units have vulcan guns or machine cannon; beam saber attack, a beam rifle or equivalent.

All units have at least four weapons/attacks plus one MAP weapon (only apllies to some units)

A slight correction to philipngui. All units will have at least two attacks, and sometimes a MAP attack. Most Ace units from the anime have four attacks plus the MAP attack.

To answer your question on Inf. Justice, no. It has it's Beam Saber, Pecalus Machine Gun (a.k.a. Vulcan), Beam Rifle and Boomerang, if I recall correctly. Then there's the MAP attack, which is basically a Full Burst (or Burst Attack, as the game calls it)